WOOLLY APHID OF THE APPLE. l8l 



On page 5 of Bulletin 133 of the Colorado Experiment .Sta- 

 tion the following statement is made : 



"If Colorado orchardists should vote their opinion as to what 

 ought to be called the worst orchard pest in the state, it is very 

 doubtful whether the codling moth, or the woolly aphids, would 

 carry off the honors." 



Although it would be easy to compile testimony of this char- 

 acter against the woolly aphid as an enemy to young apple trees 

 from numerous and widely separated parts of our country, they 

 would be chiefly a repetition of what has already been said. 



During those seasons when the species is abundant it is also 

 a serious pest on American elm. Some springs in the vicinity 

 of Orono practically every branch of many trees is tipped with 

 an unsightly cluster of deformed leaves or "rosette" gall. Such 

 an infestation, to say the least, mars the beauty of a large tree 

 and is a heavy handicap for a young one. 



